STM32F103 ADC+DMA

#include "my_adc.h" #include "delay.h" #include "flashmanege.h" u16 AD_Value[10][4] ; //初始化ADC通道 使用DMA方式传递ad数据 /*PC0 -ch10 * PC1 -ch11 * PC2 -ch12 * PC3 -ch13 */ void My_Adc_Init(void) { ADC_InitTypeDef ADC_InitStructure; GPIO_InitTypeDef GPIO_InitStructure; DMA_InitTypeDef DMA_InitStructure; RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE); //RCC->AHBENR |=1<<0;//开启DMA时钟 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC|RCC_APB2Periph_ADC1 , ENABLE ); //使能ADC1通道时钟 RCC_ADCCLKConfig(RCC_PCLK2_Div6); //设置ADC分频因子6 72M/6=12,ADC最大时间不能超过14M //PC1 作为模拟通道输入引脚 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN; //模拟输入引脚 GPIO_Init(GPIOC, &GPIO_InitStructure); //PC2 作为模拟通道输入引脚 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN; //模拟输入引脚 GPIO_Init(GPIOC, &GPIO_InitStructure); //PC1 作为模拟通道输入引脚 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN; //模拟输入引脚 GPIO_Init(GPIOC, &GPIO_InitStructure); //PC3 作为模拟通道输入引脚 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN; //模拟输入引脚 GPIO_Init(GPIOC, &GPIO_InitStructure); ADC_DeInit(ADC1); //复位ADC1,将外设 ADC1 的全部寄存器重设为缺省值 DMA_DeInit(DMA1_Channel1); //将DMA通道1寄存器重设为缺省值 DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)( &(ADC1->DR)); //DMA外设ADC1基地址 DMA_InitStructure.DMA_MemoryBaseAddr =(u32)&AD_Value; //DMA内存基地址 DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC; //内存作为数据传输的目的地 DMA_InitStructure.DMA_BufferSize = 40; //DMA通道的缓存大小 DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;//外设地址寄存器不变 DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; //内存地址寄存器地址递增 DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;//外设数据宽度为16位 DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;//内存数据宽度为16位 DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; //工作在循环缓存模式 DMA_InitStructure.DMA_Priority = DMA_Priority_High; DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; DMA_Init(DMA1_Channel1,&DMA_InitStructure); ADC_InitStructure.ADC_Mode = ADC_Mode_Independent; //设置为独立工作模式 ADC_InitStructure.ADC_ScanConvMode = ENABLE; //adc工作位扫描模式 ADC_InitStructure.ADC_ContinuousConvMode = ENABLE; //连续转换模式 ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;//外部触发关闭 ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;//转换数据右对齐 ADC_InitStructure.ADC_NbrOfChannel = 4; //4个AD转换通道 ADC_RegularChannelConfig(ADC1, ADC_Channel_10, 1, ADC_SampleTime_239Cycles5 ); ADC_RegularChannelConfig(ADC1, ADC_Channel_11, 2, ADC_SampleTime_239Cycles5 ); ADC_RegularChannelConfig(ADC1, ADC_Channel_12, 3, ADC_SampleTime_239Cycles5 ); ADC_RegularChannelConfig(ADC1, ADC_Channel_13, 4, ADC_SampleTime_239Cycles5 ); ADC_Init(ADC1, &ADC_InitStructure); //根据ADC_InitStruct中指定的参数初始化外设ADCx的寄存器 ADC_Cmd(ADC1, ENABLE); //使能指定的ADC1 ADC_DMACmd(ADC1, ENABLE); //开启ADC的DMA支持 ADC_ResetCalibration(ADC1); //使能复位校准 while(ADC_GetResetCalibrationStatus(ADC1)); //等待复位校准结束 ADC_StartCalibration(ADC1); //开启AD校准 while(ADC_GetCalibrationStatus(ADC1)); //等待校准结束 DMA_Cmd(DMA1_Channel1, ENABLE); //启动DMA通道 ADC_SoftwareStartConvCmd(ADC1, ENABLE); //使能指定的ADC1的软件转换启动功能 } u8 times = 10; //获取adc0通道ad值 电阻通道 float Get_Adc_Average(void) { int temp_val=0; u8 t; u16 temp=0; float ret; for(t=0;t<times;t++) temp_val+=AD_Value[t][0]; temp = temp_val/10; ret = (temp-AD_offset_Res)*AD_Ratio_Res; ret = ret/100; ret += AdminPra.UPpra;//加上偏移 if(ret >18.25)ret = 18.25; return ret; } //获取adc1通道ad值 Ro通道 float Get_Adc2_Average(void) { u32 temp_val=0; u8 t,t1; u16 temp; float ret; for(t=0;t<times;t++) temp_val+=AD_Value[t][1]; temp=temp_val/10; /*获得量程*/ if(AdminPra.ROrange == 0){t = 100;t1 = 1;} else if(AdminPra.ROrange == 1) {t=10;t1 = 10;} else if(AdminPra.ROrange == 2) {t=1;t1 = 100;} ret = (temp-AD_offset_Res-10)*AD_Ratio_Tivi; ret /=t; ret += (AdminPra.ROpra/100*t1); if(ret <0) ret =0; return ret; } //获取adc2通道ad值 EDI float Get_Adc3_Average(void) { int temp_val=0; u8 t; u16 temp=0; float ret; for(t=0;t<times;t++) temp_val+=AD_Value[t][2]; temp = temp_val/10; ret = (temp-AD_offset_Res)*AD_Ratio_Res; ret = ret/100; ret +=(float) (AdminPra.UPpra/100);//加上偏移 if(ret >18.25)ret = 18.25; return ret; } //获取adc3通道ad值 SR 源水 默认使用电阻表测量 float Get_Adc4_Average(void) { int temp_val=0; u8 t; u16 temp=0; float ret; for(t=0;t<times;t++) temp_val+=AD_Value[t][3]; temp = temp_val/10; ret = (temp-AD_offset_Res)*AD_Ratio_Res; ret = ret/100; ret = (float)(AdminPra.EDIpra/100);//加上偏移 if(ret >18.25)ret = 18.25; return ret; } ADC_Fun GET_ADVAL = { Get_Adc_Average, Get_Adc2_Average, Get_Adc3_Average, Get_Adc4_Average, 0, 0, 0, 0 }; void Check_AD_Device(void) { // u8 i; if(AD_Value[0][0]<100) GET_ADVAL.State=0; else GET_ADVAL.State =1; if(AD_Value[0][1]<100) GET_ADVAL.State1 =0; else GET_ADVAL.State1 =1; if(AD_Value[0][2]<100) GET_ADVAL.State2 =0; else GET_ADVAL.State2 =1; if(AD_Value[0][3]<100) GET_ADVAL.State3 =0; else GET_ADVAL.State3 =1; }